Kelly Criterion — a mathematical formula that allows you to determine the optimal bet size based on the probability of winning and the bookmaker’s odds. To make your wagering process more profitable and predictable, you can use the Kelly Criterion calculator on our website: it’s free and requires no registration.
The Kelly Criterion is a bankroll management strategy based on calculating the fraction of your bankroll to wager. It was proposed by John Kelly in 1956 and has since been widely used in both investing and sports betting. The principle is simple: when you place bets with an edge (value bets), the Kelly Criterion helps you determine what percentage of your bankroll to stake in order to maximize long-term growth.
The Kelly Criterion calculator automates all mathematical calculations. Instead of computing manually, you simply enter the required data, and the calculator instantly shows the amount you should wager from your bankroll. The calculator works based on:
The result will be presented as either a percentage or a specific amount that makes sense to wager according to the Kelly Criterion. This helps you allocate your betting budget wisely and minimize risk.
Your bankroll is $1,000. The bookmaker offers odds of 3.00, and you estimate the chance of winning at 40%. Using the Kelly formula gives the following calculation:
Result: you should wager 10% of your bankroll, i.e. $100. This is the optimal stake for those odds and probability.